How to export all tracks and not include Track Stack sub mixes?

I'm exporting all tracks as audio files and am successfully getting all my enabled tracks as advertised. But, anything sub mixed within a track stack also gets a "mixed" track in addition to the tracks within the track stack. For example, I have my acoustic guitars in a track stack. After the export I get the 2 mono acoustic tracks but also get the sub mix of the 2. Since I know this happens I just go through and delete the stereo sub mix tracks after the export. I thought I'd see if there's a trick so one doesn't have this happen?

Yeah, that's just too much work! Much easier to just delete the "extra" sub mixed tracks. This is still an awesome feature that I'm trying to train myself to get in the habit of using at the end of a project as it's really not time consuming and helps ensure archivability.